Please allow dot(.) in key fields

[ytkang]

From the version (v3.6.1) of the MongoDB does support dots (.) in the keys or field names now.

[process0]

Bump

[cosmo0920]

mongo-ruby-driver and its dependent bson gem do not support dot in key field.
I'd filed a bug ticket in MongoDB JIRA:
https://jira.mongodb.org/projects/RUBY/issues/RUBY-2562